<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>2048</title>
    <link type="text/css" rel="stylesheet" href="2048.css"/>
</head>
<body>
<div class="puzzle">
    <div class="pieces"></div>
    <div class="pieces"></div>
    <div class="pieces"></div>
    <div class="pieces"></div>
    <div class="pieces"></div>
    <div class="pieces"></div>
    <div class="pieces"></div>
    <div class="pieces"></div>
    <div class="pieces"></div>
    <div class="pieces"></div>
    <div class="pieces"></div>
    <div class="pieces"></div>
    <div class="pieces"></div>
    <div class="pieces"></div>
    <div class="pieces"></div>
    <div class="pieces"></div>
</div>
<br>
<div class="content">
    <div>方向键控制</div>
    <label>input undo password: <input placeholder="input password!" id="psw"></label>
    <button id="undo">undo</button>
</div>
<script src="2048.js"></script>
</body>
</html>